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odbc_field_name

(PHP 4, PHP 5, PHP 7)

odbc_field_name — Get the columnname

说明

odbc_field_name ( resource $result_id , int $field_number ) : string

Gets the name of the field occupying the given column number in the given result identifier.

参数

result_id: The result identifier.
field_number: The field number. Field numbering starts at 1.

返回值

Returns the field name as a string, or FALSE on error.

User Contributed Notes

anuga at anuga dot se 27-Apr-2009 12:46


I've been toying around with this for awhile to make it as simple and fast as possible.

 

<?php



/* Start The Connection */

if(!$odbc['connection'] = odbc_connect('DNS','USER','PASS'))

{

    exit("Connection Failed<br />\n");

}

else

{

    echo("Connected<br />\n");

}



/* Select Which Table */

$odbc['table'] = "table";



/* Fetch The Fieldnames into an Array */

if($result = odbc_exec($odbc['connection'],"select * from $odbc['table'];"))

{

    for($i = 1;$i <= odbc_num_fields($result);$i++)

    {

        $odbc['rows']['fields'][$i] = odbc_field_name($result,$i);

    }

    unset($i);

    odbc_free_result($result);

}

else

{

    exit("Error in SQL Query");

}



/* Close The Connection */

if(odbc_close($odbc['connection']))

{

    odbc_close($odbc['connection']);

}



/* Print The Array */

if(!empty($odbc['rows']))

{

    print_r($odbc['rows']);

}



?>

sica at wnet dot com dot br 05-Nov-2008 10:39


Hi hayes029, your idea was very helpful.

Here go a adaptation for select form field.

<?php

  $consulta = "select * from schema.table";

  $resposta = odbc_exec($con, $consulta);

  for($i=1; $i <= odbc_num_fields($resposta); $i++)

    echo "<option value=".odbc_field_name($resposta, $i).">".odbc_field_name($resposta, $i)."</option>";

?>

marco 14-Feb-2008 06:08


we faced the 31 char limit using cakephp dbo_odbc.php class (version 1.1.18.5850)



at the end, it calls odbc_fetch_row giving the problem (i tracked it may be due to the php implementation of a ODBCv2 model, which has hard coded 4bytes, 32 bits file names length, while ODBCv3 seems to have a separate specification of that value, fwiw)



we learned from another user (having similar problems with dbo_mssql.php class) how to workaround this problem, 



we solved using inheritance, redefining the method (locally to our application) in order to 

- create a "map" of the query fields (as an array) before executing it

- execute the query in a non-associative way

- after the results are returned, restore the real field names applying the previous created "map" 



another way could be use the COM like:

new COM("ADODB.Connection")

which does not show the 31 chars problem but it could be slower and bound to the windows platform.

NoEgzit 22-Nov-2007 06:23


If you really need more than 31 characters here's what you can do:



open php5.x.x/ext/odbc/php_odbc_includes.h in an editor like notepad++



change 32 by a greater value in 

typedef struct odbc_result_value {

    char name[32];

    char *value;

    SDWORD vallen;

    SDWORD coltype;

} odbc_result_value;



and recompile php.



I did it with char name[64] cause I have column names like "0214_1_VD_Type d'exploitation Type d'opération (Niveau 1)"  [I didn't choose this stupid name it comes from Eccairs project]

and rebuild php with the method given here http://www.php.net/manual/en/install.windows.building.php  and http://elizabethmariesmith.com/2006/11/09/

compiling-php52-on-windows-with-net-toolchain-is-it-even-possible/



with visual C++ express edition.

jezzghost 21-Feb-2006 10:32


Note that there is a known limitation with this which truncates the length of the returned field name to 31 characters without warning.

hayes029 at bama dot ua dot edu 13-Apr-2004 10:01


In search of a function that would simply return an array with the names of the fields in a result identifier, the only thing I could find was the odbc_field_name function.  So, for anyone else looking for such a function, here's the (very simple) function I wrote:



function odbc_field_names ($result) {

  for ($i=1; $i <= odbc_num_fields($result); $i++) $return_array[$i-1] = odbc_field_name($result, $i);

  return $return_array;

}



Very simple, I know, but I thought it might be helpful.

andrea dot galli at acotel dot com 29-Apr-2003 08:12


Example: function field name.



$Link_ID = odbc_connect("DSN", "user", "pass");



$query = "SELECT * FROM products";



$Query_ID = odbc_exec($Link_ID, $query);



while($field = $field_name($Query_ID ))

{

     echo("Field: $field<br />\n");

}



---------------------



function field_name($PrQuery_ID)

{       

     if($Column < odbc_num_fields($PrQuery_ID))

     {       

          $Column += 1;

          $FieldName = odbc_field_name($PrQuery_ID, $Column);



          return $FieldName;

     }       

     else    

     {       

          return 0;

     }       

}

aleckzandr at yahoo dot com 17-Apr-2003 12:04


Well, I've been into PHP for four hours and thanks to "my predecessors before me" (gold163, curt, et al.) I've managed the following. The first thing I try to learn with any web scripting language is to build a dynamic table from a data source. (One thing you didn't have to do gold -previous post- is build an array for the field value.) Cheers! Alex



<html>

 <head>

  <title>PHP Database Example</title>

 </head>

 <style type="text/css">

 <!--

  body {font: 10pt/12pt Tahoma, Verdana, Helvetica, sans-serif; color: indigo; margin: .25in .5in }

  table {color:Navy; background-color:AntiqueWhite; border-color:Maroon; border-style:Solid; border-width: 2px; }

  th {color: blue; font-weight: bold; }

  td {font-size: smaller; }

  .mytable {color:Maroon; background-color:White; border-color:Navy; border-style:Solid; border-width: 1px; }

  th.mytable {background-color:#C0C0C0; }

 //-->

 </style>

 <body>



 <p><?php echo date("j F, Y"); ?></p>

<?php



$db = odbc_connect("eSell22MDB","","");

$result = odbc_exec($db, "select ProductID, ProductName, Description1 from Products");



// cool function - returns table

odbc_result_all($result, "border=\"1\" class=\"def\"");



$result = odbc_exec($db, "select * from Products") or die("Select failed");



$myUtil = new Utilities();



$myUtil->standard_table($result,"mytable");



class Utilities {



     function standard_table($result,$class="")

     {

         // To format your table if you want to use cascading style sheets

         if ($class == "")

         {

             $css_table = " border=\"1\"";

             $css_tr = "";

             $css_th = "";

             $css_td = ""; 

         }

         else

         {

             $css_table = " class=\"$class\"";

             $css_tr = " class=\"$class\"";

             $css_th = " class=\"$class\"";

             $css_td = " class=\"$class\""; 

         }



         // Create field names for table header row

         $i = 0; 

         $fieldCount = odbc_num_fields($result); 

         echo "  <table$css_table>\n";

         echo "   <tr$css_tr>\n";



         while ($i < $fieldCount) 

         { 

             $i++; 

             $fieldName = odbc_field_name($result, $i); 

             echo "    <th$css_th>$fieldName</th>\n"; 

         } 

         echo "   </tr>\n";



         # Create table data rows for query result

         while (odbc_fetch_row($result)) 

         {

             $i = 0; 

             echo "   <tr$css_tr>\n"; 

             while ($i < $fieldCount) 

             { 

                 $i++; 

                 $fieldData = trim(odbc_result($result, $i));

                 if ($fieldData  == "")

                     echo "    <td$css_td>&nbsp;</td>\n";

                 else 

                     echo "    <td$css_td>$fieldData</td>\n"; 

             } 

             echo "   </tr>\n";

         }

         echo "  </table>";

     }

} // class Utilities



?>



 </body>

</html>

gold163 at lisco dot com 25-Mar-2003 09:10


Using your code, and taking it a step further, I can create a standard table from a single line of code by calling a function from my include file - the bonus is, that I can optionally provide a parameter for the name of my style sheet class - further simplifying my formatting of the table.



What synergy you find in these forums - eh?



$Conn = odbc_connect('dsn','user','pass');

$query = "SELECT * FROM yourtable"; 

$result = odbc_exec($Conn, $query) or die('Select failed!'); 



standard_table($result);



Function standard_table($result,$class='')

{

# To format your table if you want to use cascading style sheets

 if ($class == '')

 {

  $css_table = ' border=1';

  $css_tr = '';

  $css_th = '';

  $css_td = ''; 

 }

 else

 {

  $css_table = ' class=\"$class\"';

  $css_tr = ' class=\"$class\"';

  $css_th = ' class=\"$class\"';

  $css_td = ' class=\"$class\"'; 

 }



# Create field names for table header row

$i = 0; 

$fCount = odbc_num_fields($result); 

echo "<table$css_table><tr>";

  while ($i < $fCount) 

  { 

    $i++; 

    $fName = odbc_field_name($result, $i); 

    echo "<th>$fName</th>"; 

  } 

echo "</tr>";



# Create table data rows for query result

$i = 0; 

$fCount = odbc_num_fields($result); 

while (odbc_fetch_row($result)) 

{

echo "<tr>"; 

  while ($i < $fCount) 

  { 

    $i++; 

    $fName = odbc_field_name($result, $i); 

    $job[$fName] = odbc_result($result, $i); 

    echo "<td>$job[$fName]</td>"; 

  } 

echo "</tr>";

$i = 0; 

}

echo "</table>";

}

curt at digmo dot com 31-Jul-2001 06:58


I turned Jason's code into a function to roughly mimic the mysql_fetch_array function. I'm not a programmer and I've been messing with PHP less than a week, so I imagine there's a more efficient method that what I've come up with.








function odbc_fetch_array($rownum, $res)


{





$i = 0; 


$fCount = odbc_num_fields($res); 


odbc_fetch_row($res, $rownum);


    while ($i < $fCount) 


        { 


    $i++; 


    $fName = odbc_field_name($res, $i); 


    $myrow[$fName] = odbc_result($res, $i);


          }


$i=0;


return $myrow;


}

10-Mar-2001 04:11


Wow, I finally have something to contribute.


If you, like me, have been seeking a way to name and fill your variables with the appropriate names an values, rather than naming every variable and using odbc_result($result, 1), odbc_result($result, 2), etc...Then this little loop is for you!  It would probably be nice to use as function, but I'm sure you can do that on your own, eh?





<?php


$query = "SELECT * FROM TableName";


$result = odbc_exec($conn, $query) or die('Select failed!');


$i = 0;


$fCount = odbc_num_fields($result);





while (odbc_fetch_row($result)) {


    while ($i < $fCount) {


        $i++;


        $fName = odbc_field_name($result, $i);


        $job[$fName] = odbc_result($result, $i);


    }


    $i=0;


} 


?> 





This should be pretty simple code to follow, you can address your variables at any time later using the column names from your table.  For now I am addressing them with their real values and using this simply to avoid having to type out all the variable names in the top of my code.  Have fun.





Jason/ArtHacker.com

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odbc_field_name

说明

参数

返回值

User Contributed Notes

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